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Rules for Naming Binary Ionic Compounds Containing a Metal Ion With a Variable Charge. A binary ionic compound is composed of ions of two different elements - one of which is a metal, and the other a nonmetal. For example, iron(III) iodide, FeI3, is composed of iron ions, Fe3+ (elemental iron is a metal), and iodide ions, I- (elemental iodine is a nonmetal). Rule 1.
Ionic and Molecular Compounds â¢ An ionic compound consists of oppositely charged cations and anions. Usually the cation is a metal and the anion is a nonmetal or a group of nonmetals. (ie, NaCl) â¢ A molecular compound consists of two or more different nonmetals. It exists as a discrete unit of atoms. (ie, CO2) 8 â¢ NaCl is an ionic compound â¢ CO2 is a molecular compound â¢ O2 is a molecular element Figure 3.07 9 Identifying Ionic and Molecular Compounds Identify each compound as ionic or molecular. â¢ CCl4 â¢ CaF2 â¢ SF6 â¢ CuCO3 â¢ H2O 10 Identifying Ionic and Molecular Compounds Identify each compound as ionic or molecular. â¢ CCl4 â¢ CaF2 â¢ SF6 â¢ CuCO3 â¢ H2O classify 11